Pythagoras' theorem states that for a right-angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

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Pythagoras' Theorem states that in a right-angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides, ie \({a^2} = {b^2} + {c^2}\) (where \(a\) is the hypotenuse).

Look at the National 4 Pythagoras section before continuing.